MAX44000 Device Driver

Diff: BMP180.cpp

Revision:

1:1a770989adcb

Parent:

0:b2219e6e444b

Child:

2:91f97c274e89

--- a/BMP180.cpp	Fri Apr 17 09:31:09 2015 -0500
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,268 +0,0 @@
-/*******************************************************************************
- * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
- * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Except as contained in this notice, the name of Maxim Integrated
- * Products, Inc. shall not be used except as stated in the Maxim Integrated
- * Products, Inc. Branding Policy.
- *
- * The mere transfer of this software does not imply any licenses
- * of trade secrets, proprietary technology, copyrights, patents,
- * trademarks, maskwork rights, or any other form of intellectual
- * property whatsoever. Maxim Integrated Products, Inc. retains all
- * ownership rights.
- *******************************************************************************
- */
-
-#include "BMP180.h"
-
-/***** Definitions *****/
-#define I2C_ADDR            (0xEE) // 1110111x
-
-#define REG_ADDR_RESET      (0xE0)
-#define REG_ADDR_ID         (0xD0)
-#define REG_ADDR_CTRL       (0xF4)
-#define REG_ADDR_DATA       (0xF6)
-#define REG_ADDR_AC1        (0xAA)
-
-#define CTRL_REG_TEMP       (0x2E)
-#define CTRL_REG_PRESS_0    (0x34)
-#define CTRL_REG_PRESS_1    (0x74)
-#define CTRL_REG_PRESS_2    (0xB4)
-#define CTRL_REG_PRESS_3    (0xF4)
-
-//******************************************************************************
-BMP180::BMP180(PinName sda, PinName scl)
-{
-    i2c_ = new I2C(sda, scl);
-    i2c_owner = true;
-
-    i2c_->frequency(400000);
-}
-
-//******************************************************************************
-BMP180::BMP180(I2C *i2c) :
-    i2c_(i2c)
-{
-    i2c_owner = false;
-}
-
-//******************************************************************************
-BMP180::~BMP180()
-{
-    if(i2c_owner) {
-        delete i2c_;
-    }
-}
-
-//******************************************************************************
-int BMP180::init(void)
-{
-    char addr;
-    char data[22];
-    int i;
-
-    if (checkId() != 0) {
-        return -1;
-    }
-
-    addr = REG_ADDR_AC1;
-    if (i2c_->write(I2C_ADDR, &addr, 1) != 0) {
-        return -1;
-    }
-
-    if (i2c_->read(I2C_ADDR, data, 22) != 0) {
-        return -1;
-    }
-
-    for (i = 0; i < 11; i++) {
-        calib.value[i] = (data[2*i] << 8) | data[(2*i)+1];
-    }
-
-    return 0;
-}
-
-//******************************************************************************
-int BMP180::reset(void)
-{
-    char data;
-
-    data = REG_ADDR_RESET;
-    if (i2c_->write(I2C_ADDR, &data, 1) != 0) {
-        return -1;
-    }
-
-    data = 0xB6;
-    if (i2c_->write(I2C_ADDR, &data, 1) != 0) {
-        return -1;
-    }
-
-    return 0;
-}
-
-//******************************************************************************
-int BMP180::checkId(void)
-{
-    char addr;
-    char data;
-
-    addr = REG_ADDR_ID;
-    if (i2c_->write(I2C_ADDR, &addr, 1) != 0) {
-        return -1;
-    }
-
-    if (i2c_->read(I2C_ADDR, &data, 1) != 0) {
-        return -1;
-    }
-
-    if (data != 0x55) {
-        return -1;
-    }
-
-    return 0;
-}
-
-//******************************************************************************
-int BMP180::startPressure(BMP180::oversampling_t oss)
-{
-    char data[2];
-
-    data[0] = REG_ADDR_CTRL;
-    data[1] = CTRL_REG_PRESS_0 | ((oss & 0x3) << 6);
-    oss_ = oss;
-
-    if (i2c_->write(I2C_ADDR, data, 2) != 0) {
-        return -1;
-    }
-
-    return 0;
-}
-
-//******************************************************************************
-int BMP180::getPressure(int *pressure)
-{
-    char addr, byte[3];
-    uint32_t up;
-    int32_t b6, x1, x2, x3, b3, p;
-    uint32_t b4, b7;
-
-    addr = REG_ADDR_DATA;
-    if (i2c_->write(I2C_ADDR, &addr, 1) != 0) {
-        return -1;
-    }
-
-    if (i2c_->read(I2C_ADDR, byte, 3) != 0) {
-        return -1;
-    }
-
-    up = ((byte[0] << 16) | (byte[1] << 8) | byte[2]) >> (8 - oss_);
-
-    b6 = b5 - 4000;
-    x1 = (b6 * b6) >> 12;
-    x1 *= calib.b2;
-    x1 >>= 11;
-    x2 = calib.ac2 * b6;
-    x2 >>= 11;
-    x3 = x1 + x2;
-    b3 = (((((int32_t)calib.ac1) * 4 + x3) << oss_) + 2);
-    b3 >>= 2;
-
-    x1 = (calib.ac3 * b6) >> 13;
-    x2 = (calib.b1 * ((b6 * b6) >> 12)) >> 16;
-    x3 = (x1 + x2 + 2) >> 2;
-    b4 = (calib.ac4 * (uint32_t)(x3 + 32768)) >> 15;
-    b7 = ((uint32_t)up - b3) * (50000 >> oss_);
-    p = ((b7 < 0x80000000) ? ((b7 << 1) / b4) : ((b7 / b4) * 2));
-    x1 = p >> 8;
-    x1 *= x1;
-    x1 = (x1 * 3038) >> 16;
-    x2 = (-7357 * p) >> 16;
-    p += (x1 + x2 + 3791) >> 4;
-
-    *pressure = p;
-
-    return 0;
-}
-
-//******************************************************************************
-int BMP180::startTemperature(void)
-{
-    char data[2] = { REG_ADDR_CTRL, CTRL_REG_TEMP };
-
-    if (i2c_->write(I2C_ADDR, data, 2) != 0) {
-        return -1;
-    }
-
-    return 0;
-}
-
-//******************************************************************************
-int BMP180::getTemperature(float *tempC)
-{
-    char addr, byte[2];
-    uint16_t ut;
-    int32_t x1, x2;
-
-    addr = REG_ADDR_DATA;
-    if (i2c_->write(I2C_ADDR, &addr, 1) != 0) {
-        return -1;
-    }
-
-    if (i2c_->read(I2C_ADDR, byte, 2) != 0) {
-        return -1;
-    }
-
-    ut = (byte[0] << 8) | byte[1];
-
-    x1 = ((ut - calib.ac6) * calib.ac5) >> 15;
-    x2 = (calib.mc << 11) / (x1 + calib.md);
-    b5 = x1 + x2;
-
-    *tempC = (float)(b5 + 8) / 160;
-
-    return 0;
-}
-
-//******************************************************************************
-int BMP180::getTemperature(int16_t *tempCx10)
-{
-    char addr, byte[2];
-    uint16_t ut;
-    int32_t x1, x2;
-
-    addr = REG_ADDR_DATA;
-    if (i2c_->write(I2C_ADDR, &addr, 1) != 0) {
-        return -1;
-    }
-
-    if (i2c_->read(I2C_ADDR, byte, 2) != 0) {
-        return -1;
-    }
-
-    ut = (byte[0] << 8) | byte[1];
-
-    x1 = ((ut - calib.ac6) * calib.ac5) >> 15;
-    x2 = (calib.mc << 11) / (x1 + calib.md);
-    b5 = x1 + x2;
-
-    *tempCx10 = (b5 + 8) >> 4;
-
-    return 0;
-}